i think you should motivate her just like everyone else, tell basic good things about bitcoin, don't tell any bad things about bitcoin, and i am sure that she will like it
bitcoin is good overall. it have no bad things except the scammers of bitcoin industry. and I think we should warn them to be careful from scammers. if we only tell her good things of bitcoin and avoid these scammers. and by chance she got scammed(which is almost very possible) then she'll lost her trust on bitcoin again and will never be convinced again.
Mostly women falls victim easy to scammers because they do not use their brain so much, they can easily be deceived and most of the scammers are men, I think it is hard for the women to live in crypto world. No offense to women but that is just my opinion.